Previously documented T315I mutation. Other CML treatment is an exclusion criteria with the following exception: While awaiting study start, patients may be treated with anagrelide (no treatment duration limit), hydroxyurea (no treatment duration limit), and/or up to a 14 day supply of a tyrosine kinase inhibitor (TKI) approved by the FDA for frontline treatment. Patients taking a TKI prior to study entry must have at least a one day washout from their last dose of medication and have recovered from any side effects of such therapy.